Projecting-machine.



W. H. SIAVENHAGEN.

PROJECTING MACHINE.

APPLICATION FILED NOV. 14- I917.

Patented Dec. 24, 1918.

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W. H. STAVENHAGEN;

PROJECTING MACHINE.

APPLICATION man NOV. M. I917- Patented Dec. 24,1918.

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W. H. STAVENHAGEN.

PROJECTING MACHINE.

APPLICATION FILED u0v.14.1911.

1 ,289,0 1 2 Patented Dec. 24, 1918.

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WILHELM H. STAVENHAGEN, OF NEW YORK, N. Y.

PBOJECTING-MACHINE.

Specification of Letters Patent.

Patented Dec. 24, 1918.

Application filed November 14, 1917. Serial No. 201,906.

To all whom it may concern:

Be it known that I, WILHELM H. STAVEN- HAGEN, a citizen of the United States, and a resident of New York city, county and State of New York, have invented certain new and useful Improvements in Projecting-Machines. set forth in the following specification.

This invention relates to apparatus for proj ecting images, as, for example, projecting the images on lantern slides upon a viewing screen. The object of the invention is to provide improved apparatus for projecting such images. In particular, it is an object of the invention to provide for the automatic dislay of one image after another in a cheap and reliable manner. it is desirable and made possible by this invention to effect the display of a projected image throughout a sufficiently long time interval to insure the comprehension by the onlooker and to effect the shift from one image to another in much less time.

The above and further objects of the in vention will better be understood by reference to the illustrative embodiment to which the following claims are directed merely for purposes of illustration, and which is described in the following specification in connection with the accompanying drawings, which form a part hereof, and in which like characters designate corresponding parts in the several figures, and in which Figure 1 is a horizontal section through a cabinet inclosing the principal part of the apparatus, which is shown in plan and with parts broken away; Fig. 2 is a vertical section, with parts shown in elevation, along line IL-II of Fig. 1; Fig. 3 is a detail plan view of the race bearing for the turn-table, certain parts being shown in horizontal section;

Fig. 1 is a detail'plan of the mirror mounting; Fig. 5 is a diagrammatic vertical section showing a cabinet and the image project-ion; Fig. 6 is a detail elevation of a lantern-slide clip; and Fig. 7 is a section through line VIIVII of Fig. 6.

A suitable base-board A operably mounts the apparatus, including a cabinet B hinged thereto. 0 indicates'a suitable lantern pro viding a suitable source of light which is delivered to the condensing lenses 1, and then projects inwardly, as indicated by the lines 2.

A standard D, a plate 3; a vertical stem 4, fixed to the plate 3 as by a pin 5; and the top bracket frame 6 are suitably anchored to the base-board A, as by the screws indicated in dotted lines in Fig. 2. This entire standard is therefore fixed against rotation. A suitable motor, such as the electric motor 7, is secured to this standard through the medium of its bracket 8. An adjustable lens-holder 9 is supported by the standard through the medium of the bracket frame 10, upon which it may be adjusted through the medium of the bolt 11 and slot 12. The bracket frame 6 is anchored to the stem 4 in any suitable manner, as by a pin similar to the pin 5. To an upward projection of the stem 4 a hinge clip 13 is anchored, so that it may be adjusted relatively to the stem or standard 4 through the medium of a thumb bolt 14. This hinge clip also provides a swingingadjustment for the clip slides 15, through the medium of the hinge 16, which may be set against turning by the set screw 17. The clip slides 15 are adapted to grip the tongue 18, anchored to the frame 19 which supports the mirror 20.

The light emerging from the lantern C after passing through a lantern slide, is focused in the lens 21 mounted in the holder 9 and is then projected as indicated by the beam lines 22 against the mirror 20 mounted at an angle of 45, whence the image projection is directed upwardly, as indicated by the lines 23 in Fig. 5, preferably against a translucent screen 24:, which may be viewed from without the cabinet B through a suitable window 25 against the mirror 26,-ar ranged at an angle of 45 from the h0rizontal.

The plate 3 is provided with a circular ball race 30, serving as a bearing for the balls 31, which carry a spider 32 having a downwardly directed circular bearing 33 resting upon the balls 31. This spider 32 forms part of the turn-table E, the outer portion of which may be in the form of a centrally perforated disk 34, suitably anchored as by bolts 35 to the arms 36 of the spider 32. If desired, this rim portion may be braced at intervals by upwardly inclined arms 37.

Upon the outer periphery of the turntable E is mounted a series of lantern-slide clips F, all concentrically arranged about the-center of the turn-table and in vertical position, the individual clip 40 being shown directly in front of the condensing lens 1, so that it is the image from the lantern-slide shaft "52, in mesh with the worm gear 54, anchored to be held therein, such as the lantern-slide 41 which is shown in dot and dash lines in Fig. 7 that is being projected in the diagrams of Figs. 1 and 5.

So far as the ball-bearing formed by the races 30 and 33 and the balls 31 isconcerned, this turn-table is free to rotate about an axis corresponding to theaxis of the vertical stem 4 and its entire weight is taken up by this ball-bearing, in consequence-of which but slight force is required to effect a rotation thereof.

Spaced concentricallyabout the periphery of the turn-table are a plurality of pairs of cam-followers, which are provided in a suitable manner through the medium of-pins G, of which the individual pins 42 and 43 are shown in contact with the cam 44,which is embodied in the form of an arm 45, swiveled by the pivot 46 to the base A and forcibly drawn inwardly by the tension spring 47, anchored-to the base A. This cam 44 has double inclines 48 and-49 in cooperation with'the pins42 and 43, as indiv proper position-for a slide held therein to have its image projected from the light beam 2'2.

Driving mechanism, preferably of the type" capable itself of effecting intermittent movement of the turn-table, connects the turn-table with the motor" 7. In the present embodiment the driving mechanism is capable itself of effecting intermittent movement, but its action is amplified, as will presently be described, through the medium of' the cam 44.

The-motor operates through the worm 50 to drive the worm wheel 51, mounted on the which in turn carries a worm 53 to the top face of the boss 55, which is free to turn about'the stem 4. The bottomflange ofthe' boss '55 is-finishedin the formof a horizontal eccentric 56, lightly resting upon the counter-sunk face 57 of the plate 3 for a bearing. Accurately fitting the eccentric circular rim 58 of the eccentric 56 is a: gear ring 59. "This gear ring-59 has a bearing likewise upon the counter-sunk -face: 57 and is anchored against completerotationybutis permitted to oscillate withthe eccentric 56 by means of adownw-ardly projectingpin '60, working in the slot 61 of the link 62 piv- 'oted bythe pin-63 to theplate 3, in a suitable recess 64.

Surrounding the gear ring 59 is an interdiameterthan the external' diameter of the ring 59, and with its gear teeth 67 directed gear teeth68 of the ring59. It is satisfactory if the number of teeth in the ring 66 exceed the number of teeth in the ring 59 by three or four in number,-say, sixty teeth in the outer ring and 57 in the inner ring. The outer gear ring 66 is anchored to the spider 32in a suitable manner, as by the screws 70, and it is preferable that this gear ring be provided with a projecting flange or lip 71, so that a ring 72 may overlap the same and, by being anchored in a suitable manner to the plate 3, prevent the accidental removal of the turn-table .4.

The lanternsslide clips F comprise an upstanding plateSO with a lower offset 81,- and forming a foot which may be. anchored to the turn-table plate 34 in a suitable manner asbyrivets or screws 82. ,Sidedips 83 and 84serve tozstrengthen the plate 80 and form end bearings for the spindle 85. Nearthc upper end ofthe plate 80 a narrow flap is punched out and bent in to. form the horizontal lip 86, which serves as a rest for the lower edge of lantern-slide 141. A jaw '87 .havingfvertical side-lips88, 89 is; pivoted to the spindle 85, which passes through suitable perforations in the lips :88 and 89. A flapshaped' portion: of the'jaw 87 is bent rearwardly to form a finger-hold 90, through" the medium of which the grip portion9l of the jaw 87 which overlies the portion 92 of the plate80 above thevledge'86 may be moved out against the pressure of the spring arms 93 and 94 to. release or permit the adjustment of a lantern-slide 41.

Preferably everyone of the clips, F isfitted witha lantern-slide, although the'omission of a lantern-slide fromanyone. of the clips causes nothing more than the omission of an image display through one timepinterval.

. It is'contemplated :that theinotor/ 7-.and the-lantern C operate continuously from. any suitable source of. power. The motor 7, through the worm gearing, slowlydrives-the 2 021111 56 in the direction of-the arrows shown in Fig.3. Ifthe externalgearGZ-is."stationary andthe internalgear 59Mfreeto ro tate; except for the vconstraint of theeccentricr56, it wouldbe rotated in the direction opposite .to theiarrow ofFigyBan, angular amount equivalent to thedilference in the number of: its teeth and the number of teeth .in the externalgear 67 foreach rotationlof thecccentric '56 in the direction ,ofthearrow.

' The :link; '62 and pin 60, however, prevent this reverse rotation and the outer gear ring 66, being. anchored. only -to thei turn-tab1e; E

through the screws 0',=there. isl1.elfiected aurotation of the outer gearring66 in. the direction of the arrowof- 3 an amountiequivalent to theteeth difference aforementioned na l gear ring 66 of materially larger internal for eachrotation of theeccentric 56. .For a :large portionof the rotation of the eccentric 56, the-turn-tableis at rest. This'intermitinwardly toward the outwardly' 'directed tent-movement is increased, ho wever,= through the medium of the slack connection provided between'the pin '60 and the link 62throug'h the slot 61.-that is because there is a slack connection between the turn-table and its positive driving mechanism. The cam mechanism 4:5 is capable of taking up more or less of the slack as soon as the peak 96 has been passed by one of the cam-followers or pins 42. The initial portion of each rotary step imparted to the turn-table E causes one of the cam-followers G such as 42, to be forced against the cam face a8, forcing out the cam against the tension of the spring 47. When the peak 96 of the cam 4a has been reached. and slightly passed by a pin G, the pull of the spring 47 exerted by the cam face 4C9 upon the rear side of the pin suddenly snaps the turn-table around one complete stop, so that the next lantern-slide has been thrust into position for projection and display. This operation is repeated continuously. When this snap forward of the turn-table E is effected, the pin 60 rides along in the slot 61 of the link 62 toward its pivoted end 63 and the slack thus introduced into the gearing must be taken up before a new movement of the turn-table can be effected by the eccentric and ring gears.

What is claimed and what is desired to be secured by United States Letters Patent 1. In image projecting apparatus, a central fixed standard; a turn-table rotatably mounted about said standard; a plurality of lantern-slide clips mounted concentrically in vertical position upon said turn-table; a fixed radially inwardly directed source of li ht outside of said table for cooperating with said clips; an inclined mirror fixed to said standard for deflecting an image-beam; and means for automatically rotating said turn-table by intermittent steps corresponding to the spacing of said clips, said means comprising a motor fixed to said standard.

A projecting machine comprising a stationary platform having a circular runway; a standard projecting upwardly inside of said runway; a turntable arranged to turn Copies of this patent may be obtained for five cents each, by addressing the Washington, 10. 6.

on said runway; vertically positioned clips mounted concentrically on said turn-table; a beam reflecting mirror attached to said standard; and a motor fixed to said standard for rotating said turn-table.

3. A clip for mounting lantern slides comprising a fixed plate of sheet metal having a laterally projecting lip paralleling the exposed edge thereof; a movable jaw hinged to said plate near the end opposite said lip, said jaw having a portion overlying the portion of said plate beyond said lip and an outstanding finger hold; and resilient'means for pressing said jaw against said plate.

4. An apparatus for displaying projected images comprising, a stationary platform; a circular runway on said platform; a turntable mounted to turn on said runway; an inwardly projected source of light; imageholding clips carried by said turn-table in cooperative relation with said source of light; a frame supporting an angularly-positioned mirror above said turn-table; a standard projecting upwardly from said platform; a beam reflecting mirror attached to said standard; and a motor for turning said turn-table fixed to said standard.

5. A. projecting apparatus comprising a stationary platform having a circular runway; a turn-table mounted on said runway contiguous to said platform; said turn-table having circularly and vertically positioned clips for holding image-plates; an inwardly directed stationary source for a light beam to cooperate with said clips; a standard fixed to said platform and projecting upwardly within said turn-table; an image reflecting mirror fixed to said standard; and means for intermittently rotating said turn table operably fixed to said standard, whereby a superpositioned image may be displayed with a minimum space for the operating mechanism.

Got. 26, 1917.

W. H. STAVENHAGEN.

Commissioner of Patents, 

